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Efficient catalytic ozonation technology and treatment system thereof

A technology of ozone catalytic oxidation and catalytic oxidation, which is applied in the direction of oxidized water/sewage treatment, special compound water treatment, water/sewage treatment, etc., can solve the problems of limited efficiency, increase the contact area, improve the utilization rate of ozone, and improve efficiency and the effect of removing the effect

Inactive Publication Date: 2019-08-09
BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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  • Application Information

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Problems solved by technology

However, the device still uses the traditional aeration method, so the efficiency is limited

Method used

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  • Efficient catalytic ozonation technology and treatment system thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The biochemical effluent COD of a coking wastewater biochemical pool is 130mg / L, which is treated by conventional ozone catalytic oxidation process:

[0031] 1. Produce ozone by high-voltage corona discharge through an ozone generator to obtain ozonated gas, the gas source is oxygen, and the ozone concentration in the obtained ozonated gas is 100mg / L.

[0032] 2. The ozonated gas produced in step 1 enters the ozone catalytic oxidation tower through aeration. The dosage of ozone is 75g / t of water, and catalytic oxidation reaction occurs through the action of the catalyst, and the wastewater residence time is 60min.

[0033] The COD of the effluent from the ozone catalytic oxidation tower can be reduced to 75mg / L, and the COD removal rate is 42.3%.

Embodiment 2

[0035] Adopt process of the present invention to process embodiment 1 waste water:

[0036] 1. Produce ozone by high-voltage corona discharge through an ozone generator to obtain ozonated gas, the gas source is oxygen, and the ozone concentration in the obtained ozonated gas is 100mg / L.

[0037] 2. The ozonized gas prepared in step 1 enters the ozone concentration unit through the pipeline. This unit adopts the principle of pressure swing adsorption to absorb the oxygen and other gases in the ozonized gas through the carbon molecular sieve adsorbent, and the obtained high-concentration ozone gas, the ozone concentration Increase by 6 times to 600mg / L. After the adsorbent is saturated, the adsorbed oxygen is released through pressure swing desorption to regenerate the adsorbent.

[0038] 3. Mix the high-concentration ozone gas obtained in step 2 with the wastewater through the dissolved air pump, the mixed gas-liquid ratio is 1:8, and the calculated ozone dosage per ton of wate...

Embodiment 3

[0042] The biochemical effluent COD of a coking wastewater biochemical pool is 150mg / L, which is treated by conventional ozone catalytic oxidation process:

[0043] 1. Produce ozone by high-voltage corona discharge through an ozone generator to obtain ozonated gas, the gas source is oxygen, and the ozone concentration in the obtained ozonated gas is 120mg / L.

[0044] 2. The ozonated gas produced in step 1 enters the ozone catalytic oxidation tower through aeration. The dosage of ozone is 107g / t of water. Catalyzed oxidation reaction occurs through the action of the catalyst, and the wastewater residence time is 80min.

[0045] The COD of the effluent from the ozone catalytic oxidation tower can be reduced to 86mg / L, and the COD removal rate is 42.7%.

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Abstract

The invention discloses an efficient catalytic ozonation technology. According to the technology, by adopting high-voltage corona discharge, ozone is prepared, after entering an ozone concentration unit, ozonation gas is concentrated and sufficiently mixed with wastewater through a gas dissolution pump, and then the mixed solution enters a catalytic oxidation unit. According to the technology, byadopting a pressure swing adsorption principle, ozone generated by an ozone generator is concentrated, high-concentration ozone can be obtained, the ozone concentration is increased by 3-8 times, thegas dissolution pump is adopted for replacing a traditional aeration technology, ozone can be converted into micron-order bubbles through the gas dissolution pump, the bubbles are sufficiently mixed with the wastewater, the contact area of the ozone and the wastewater is greatly increased, and the ozone utilization rate is effectively increased. Under the condition of the same ozone addition amount, the COD removal rate can be effectively increased by 10-30%.

Description

technical field [0001] The invention belongs to the field of advanced wastewater treatment, and in particular relates to a high-efficiency ozone catalytic oxidation process and a treatment system thereof. Background technique [0002] Wastewater from chemical, pharmaceutical, printing and dyeing, papermaking and other industries will also contain some refractory organic matter after biochemical treatment, mainly including some heterocyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons and long-chain compounds. And COD and other indicators cannot meet the discharge or reuse treatment, so the biochemical effluent needs to be further treated to meet the reuse standards or increasingly stringent discharge standards. [0003] At present, for the advanced treatment of biochemical effluent, the oxidation method is mainly used. Oxidation method is a method of using strong oxidants to oxidize and decompose pollutants in water to purify wastewater. It mainly includes Fento...

Claims

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Application Information

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IPC IPC(8): C02F1/78
CPCC02F1/725C02F1/78C02F2305/02
Inventor 李海波翟威盛宇星李玉平王靖宇
Owner BEIJING CYCLE COLUMBUS ENVIRONMENTAL SCI & TECH
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